煤层气井自循环平衡注水洗井工艺技术研究  

Study on Well Washing Technology with Self-circulating Balanced Water Injection for Coalbed Methane Wells

作　　者：李千山 屈建红 豆高峰 薛志亮 范志辉 LI Qianshan;QU Jiangong;DOU Gaofeng;XUE Zhiliang;FAN Zhihui(Jincheng Branch,China United Coalbed Methane Corporation,Shanxi 048000)

机构地区：[1]中联煤层气(山西)有限责任公司晋太分公司,山西048000

出　　处：《中国煤层气》2024年第5期13-17,共5页China Coalbed Methane

摘　　要：煤粉沉积是制约煤层气连续稳定生产的重要因素,目前煤层气行业普遍采用的方式是在作业过程中伴随油管下入注水管,间歇性向井筒注入清水,以提高产出水的携煤粉能力,保障井的稳定运行。但随着洗井工艺技术不断地实践,暴露出洗井工艺技术投入成本高、外来水储层配伍性差、工作不连续及井口窜气存在安全隐患等难题。论文针对目前煤层气生产过程中洗井工艺存在的问题,通过技术攻关和现场试验,对传统回注洗井工艺进行自主升级改造,研究出一套自循环平衡洗井新工艺以及回注水与产出水平衡关系模型,实现标准化应用,保障煤层气井的排采连续与稳定。Pulverized coal deposition is an important factor restricting the continuous and stable produc-tion of coalbed methane.At present,the common method adopted in the coalbed methane industry is to accompany the pipe string of water injection along with the tubing running during the operation,and in-termittently inject clean water into the wellbore to improve the carrying capacity of produced water for pul-verized coal and ensure the stable production of coalbed methane wells.However,with continuous prac-tice,challenges have emerged with the well washing process and technology,including high investment cost,poor compatibility with external water reservoirs,discontinuous operation and potential safety haz-ards related to gas channeling at the wellhead.This paper addresses the the problems existing in the cur-rent well washing process in coalbed methane production.Through technical research and field experi-ments,the traditional re-injection well washing process has been independently upgraded and trans-formed.A new self-circulating balanced well washing process has been developed,along with the balance model between re-injection water and produced water,so as to achieve standardized application and en-sure the continuous and stable drainage and production of coalbed methane wells.

关 键 词：煤层气井 自循环 平衡注水 洗井工艺 

分 类 号：TE3[石油与天然气工程—油气田开发工程]